Vermont, 1950. There's a place for the girls whom no one wants--the troublemakers, the illegitimate, the too smart for their own good. It's called Idlewild Hall. And in the small town where it's located, there are rumors that the boarding school is haunted. Four roommates bond over their whispered fears, their budding friendship blossoming--until one of them mysteriously disappears. . . .Vermont, 2014. As much as she's tried, journalist Fiona Sheridan cannot stop revisiting the events surrounding her older sister's death. Twenty years ago, her body was found lying in the overgrown fields near the ruins of Idlewild Hall. And though her sister's boyfriend was tried and convicted of murder, Fiona can't shake the suspicion that something was never right about the case.
When Fiona discovers that Idlewild Hall is being restored by an anonymous benefactor, she decides to write a story about it. But a shocking discovery during the renovations will link the loss of her sister to secrets that were meant to stay hidden in the past--and a voice that won't be silenced.

This book sets an atmosphere in the first pages. A girl being chased trough the woods. Soon you start to question which girl as more seem to be missing in the various stories developing in this book.
There is the part with the girls living in the boarding house back in the 50's. As all four girls get to tell their part of the story and how they experienced it you get a lot of information on how that period was. The voice are not really distinct but their stories are. There were some really scary parts in their stories. All four are easy to like and connect too.
Then there is the part with Fiona. On the search for the truth about her sisters dead she discovered some things that were neglected in the investigation. Getting tangled up in an even older case the police wont work on she starts this interesting investigation about the history of Idlewild Hall and what happened in those years. I liked how as a reader I was able to puzzle along with her mystery. I really enjoyed the way both stories touched too.
As the story developed I did get scared about all the story lines and if the 336 pages would be enough to get all the answers. There were two mysteries that needed solving, there were some ghosts questions that needed some explaining and obviously as a reader I had to know what happened with all the people in the story. Thankfully everything was tied up really nice in the end and the only warning I can give is that you wont be able to put this one down when you start reading.